.nav {
  width: 100%;
  background-color: #333;
}

.nav > .nav-center {
  width: 1200px;
  margin: 0 auto;
  height: 40px;
}

.nav > .nav-center > ul {
  list-style: none;
  display: flex;
}

.nav > .nav-center > ul > li {
  width: 80px;
  text-align: center;
  line-height: 40px;
}

.nav > .nav-center > ul > li:hover {
  background-color: #000;
}

.nav > .nav-center > ul > li > a {
  text-decoration: none;
  color: #fff;
  font-weight: 900;
}
